CN115729007A - Display panel and display device - Google Patents
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- CN115729007A CN115729007A CN202211448983.6A CN202211448983A CN115729007A CN 115729007 A CN115729007 A CN 115729007A CN 202211448983 A CN202211448983 A CN 202211448983A CN 115729007 A CN115729007 A CN 115729007A
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Abstract
The embodiment of the application provides a display panel and a display device, wherein the display panel comprises a display area, and the display area comprises a substrate, and a pixel light-emitting layer, an encapsulation layer, a color-changing layer and a reflection layer which are sequentially arranged on one side of the substrate; the pixel light-emitting layer comprises a plurality of light-emitting units arranged at intervals; the color changing layer comprises a plurality of electrochromic devices arranged at intervals; the reflecting layer comprises a plurality of reflecting units which are arranged at intervals and used for reflecting external light; the electrochromic device can be changed between a transparent state and a color development state, and when a first voltage is applied to the electrochromic device under the breath screen state, the electrochromic device is in the color development state, so that the display panel can display the superposed color of the reflecting layer and the color development layer. According to the display panel, the reflection layer formed by the reflection unit enables the display panel to show a mirror effect, the electrochromic device is applied with the first voltage to be converted into a color development state, and the electrochromic device and the reflection layer show superimposed colors together.
Description
Technical Field
The present application relates to the field of display panel technology, and in particular, to a display panel and a display device.
Background
Along with the continuous development of intelligent science and technology, the demand of market to the product that mirror surface and demonstration combine is more and more extensive, and this type of product has display image and mirror function concurrently, not only applies to the application scene such as house, market, advertising, makeup and beauty, still can apply to application scenes such as on-vehicle rear-view mirror.
However, the display screen with the mirror function generally displays a silver common mirror surface in a breath screen state, and the selectable color is single, so that the requirements of people cannot be met.
Disclosure of Invention
An object of the embodiments of the present application is to provide a display panel and a display device, where the display panel can display a silver color and a color superimposed color, and enrich a display effect of the display panel in a screen-saving state. The specific technical scheme is as follows:
a first aspect of the present application provides a display panel, including: the display area comprises a substrate, and a pixel light emitting layer, an encapsulation layer, a color changing layer and a reflection layer which are sequentially arranged on one side of the substrate;
the pixel light-emitting layer comprises a plurality of light-emitting units arranged at intervals, and interval areas are arranged among the light-emitting units;
the color changing layer comprises a plurality of electrochromic devices arranged at intervals, and the electrochromic devices are arranged in one-to-one correspondence with the light emitting units along the orthographic projection perpendicular to the substrate direction;
the reflecting layer comprises a plurality of reflecting units and a plurality of hollow parts, the reflecting units are spaced from each other and used for reflecting external light, the orthographic projection of the reflecting units in the direction perpendicular to the substrate corresponds to the spaced areas, and the orthographic projection of the hollow parts in the direction perpendicular to the substrate corresponds to the light emitting units;
the electrochromic device can be changed between a transparent state and a color development state, a first voltage is applied to the electrochromic device in the breath state of the display panel, the electrochromic device is in the color development state, and the superposed color of the reflecting layer and the color development layer can be displayed.
In this embodiment, a plurality of reflective units are disposed at intervals on the pixel light-emitting layer, the plurality of reflective units reflect external light, and the reflective layer formed by the plurality of reflective units makes the display panel exhibit a mirror effect. Along the direction of the plane where the substrate is located, the plurality of reflection units are respectively located between two adjacent light-emitting units, namely the reflection units and the light-emitting units are arranged in a staggered mode, the reflection units cannot block emergent light of the light-emitting units, and the reflection layer achieves the mirror effect of the display panel and does not affect the light transmittance of the light-emitting units.
The electrochromic device can be changed between a transparent state and a color development state, and the electrochromic device is arranged in one-to-one correspondence with the light emitting units along the orthographic projection in the direction perpendicular to the substrate, namely in correspondence with the positions of the hollow parts of the reflecting layer. In the breath screen state, the electrochromic device is converted into a color development state by controlling a first voltage applied to the electrochromic device, the electrochromic device and the reflection unit jointly present superimposed colors, and the finally displayed superimposed colors are different according to different material selections of the electrochromic device. For example, an electrochromic device made of tungsten oxide can display blue when a first voltage is applied; the electrochromic device made of titanium dioxide can show green color when a first voltage is applied. The electrochromic device can also be matched with complementary color materials to realize the blending of various colors. The electrochromic device can be an all-solid-state electrochromic device, each layer structure of the electrochromic device is usually manufactured by adopting a physical vapor deposition method, and the film layers are deposited one by one. The reflection layer is generally made of metal materials, so the metal reflection layer presents the luster of metal, and taking a metal aluminum reflection layer as an example, the color of the reflection layer is silver, and finally the display panel can present a transition color between blue and silver or green and silver, so that the display panel can realize the display of various colored mirror surfaces and better meet the requirements of users.
In addition, according to the display panel provided by the embodiment of the application, the display panel can further have the following technical characteristics:
in some embodiments of the present application, when the display panel is in a breath screen state and a second voltage is applied to the electrochromic device, the electrochromic device is in a transparent state, so that the display panel can display the color of the reflective layer.
In some embodiments of the present application, the electrochromic device includes at least a first transparent electrode, an electrochromic layer, and a second transparent electrode;
the display panel further comprises a driving chip, the first transparent electrode and the second transparent electrode are respectively electrically connected with the driving chip, and the driving chip is used for applying a first voltage to the electrochromic layer through the first transparent electrode and the second transparent electrode to enable the electrochromic layer to be in the color development state, so that the display panel can display the superposed color of the reflecting layer and the color development layer; or the driving chip is configured to apply a second voltage to the electrochromic layer through the first transparent electrode and the second transparent electrode to enable the electrochromic layer to assume the transparent state, so that the display panel can present the color of the reflective layer.
In some embodiments of the present application, the electrochromic layer includes an electrochromic material layer, an electrolyte layer and an ion storage layer disposed between the first transparent electrode and the second transparent electrode, the electrolyte layer is disposed in contact with the electrochromic material layer, the ion storage layer is disposed in contact with the electrolyte layer, the ion storage layer is used for providing and storing ions required for color change, and the electrolyte layer is used for conducting ions required in a color change reaction process to the electrochromic material layer.
In some embodiments of the present application, the electrochromic layer includes an electrochromic material layer and a composite conductive layer disposed between the first transparent electrode and the second transparent electrode, the composite conductive layer being capable of generating free electrons and ions and conducting ions to the electrochromic material layer as needed during a color change reaction.
In some embodiments of the present application, the electrochromic layer is made of an inorganic electrochromic material or/and an organic electrochromic material.
In some embodiments of the present application, the inorganic electrochromic material comprises a transition metal oxide.
In some embodiments of the present application, the display panel further includes a peripheral area, the peripheral area is disposed around the display area, the substrate extends to the peripheral area, a plurality of the electrochromic devices are disposed on a substrate side of the peripheral area, and the electrochromic devices and the pixel light emitting layer of the peripheral area are located on a same side of the substrate; and a reflection unit is arranged on one side of the electrochromic device in the peripheral area, which is far away from the substrate.
In some embodiments of the present application, the display panel further comprises a light-shielding layer between the color-changing layer and the reflective layer; the shading layer comprises a plurality of shading units which are arranged at intervals, and the shading units are positioned between two adjacent light-emitting units along the direction perpendicular to the plane where the substrate is positioned.
A second aspect of the present application provides a display device, including the display panel in any of the embodiments of the first aspect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is also obvious for a person skilled in the art to obtain other embodiments according to the drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of an electrochromic device provided in an embodiment of the present application in one embodiment;
FIG. 3a is a schematic perspective view of the electrochromic device of FIG. 2;
FIG. 3b is a spectrum of the electrochromic device structure of FIG. 2;
FIG. 4 is a schematic structural diagram of an electrochromic device provided in an embodiment of the present application in another embodiment;
fig. 5 is a top view of a display panel according to an embodiment of the present application.
The reference numbers are as follows:
the display device comprises a display area 10, a peripheral area 20, a substrate 100, a light emitting unit 200, an encapsulation layer 300, a first flat layer 400, an electrochromic device 410, a first transparent electrode 420, an electrochromic layer 430, a second transparent electrode 440, an electrochromic material layer 450, an electrolyte layer 460, an ion storage layer 470, a composite conductive layer 480, a reflecting unit 500, a second flat layer 510, a shielding unit 600, a glass cover plate 700 and an SCF layer 800.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the description herein are intended to be within the scope of the present disclosure.
As shown in fig. 1 and 5, a first aspect of the present application proposes a display panel, including: the display area 10, the display area 10 includes a substrate 100 and a pixel light emitting layer, an encapsulation layer 300, a color changing layer and a reflective layer sequentially disposed on one side of the substrate 100.
The pixel light emitting layer includes a plurality of light emitting cells 200 arranged at intervals.
The color changing layer includes a plurality of electrochromic devices 410 disposed at intervals, and the electrochromic devices 410 are disposed in one-to-one correspondence with the light emitting cells 200 in a direction perpendicular to a plane in which the substrate 100 is located.
The reflective layer includes a plurality of reflective units 500 spaced apart from each other, the reflective units 500 are used for reflecting external light, and the reflective units 500 are located between two adjacent light-emitting units 200 along a direction perpendicular to a plane of the substrate 100.
The electrochromic device 410 can be changed between a transparent state and a color-developing state, when the display panel is in the breath-screen state, a first voltage is applied to the electrochromic device 410, and the electrochromic device 410 is in the color-developing state, so that the display panel can develop the superposed color of the reflective layer and the color-developing layer.
In this embodiment, a plurality of reflective units 500 are disposed at intervals on the pixel light emitting layer, the plurality of reflective units 500 reflect external light, and the reflective layer formed by the plurality of reflective units 500 makes the display panel exhibit a mirror effect. Along the direction perpendicular to the plane of the substrate 100, the plurality of reflection units 500 are respectively located between two adjacent light-emitting units 200, that is, the reflection units 500 and the light-emitting units 200 are arranged in a staggered manner, the reflection units 500 do not block the emergent light of the light-emitting units 200, and the reflection layer not only realizes the mirror effect of the display panel, but also does not affect the light transmittance of the light-emitting units 200.
Specifically, the light emitting unit includes a red light emitting unit R, a green light emitting unit G, and a blue light emitting unit B, and the red light emitting unit R, the green light emitting unit G, and the blue light emitting unit B are arrayed in a certain order.
In order to simplify the process, the electrochromic device 410 is generally disposed in the same layer, and is referred to as a color change layer. Of course, the electrochromic devices 410 may be disposed in different layers, which is not limited in this application.
The electrochromic device 410 may be changed between a transparent state and a color-developing state, and the electrochromic device 410 is disposed in one-to-one correspondence with the light emitting unit 200 along an orthographic projection in a direction perpendicular to the substrate 100, that is, in correspondence with a position of the hollow portion of the reflective layer. In the breath screen state, the electrochromic device 410 is converted into the color development state by controlling the first voltage applied to the electrochromic device 410, the electrochromic device 410 and the reflection unit 500 jointly present the superimposed color, and the superimposed color finally presented is also different according to different materials selected by the electrochromic device 410. For example, an electrochromic device 410 made of tungsten oxide may appear blue when a first voltage is applied; the electrochromic device 410 made of titanium dioxide may exhibit a green color when a first voltage is applied. The electrochromic device 410 may also be matched with complementary color materials to achieve multiple color blending. The electrochromic device 410 may be an all-solid-state electrochromic device 410, and each layer structure of the electrochromic device is generally manufactured by a physical vapor deposition method, and the film layers are deposited one by one. The reflection layer is generally made of metal materials, so the metal reflection layer presents the luster of metal, and taking a metal aluminum reflection layer as an example, the color of the reflection layer is silver, and finally the display panel can present a transition color between blue and silver or green and silver, so that the display panel can realize the display of various colored mirror surfaces and better meet the requirements of users.
Of course, in order to ensure the normal operation of the display panel, the electrochromic device 410 can be converted into a transparent state by controlling the voltage applied thereto in the bright state without affecting the transmittance of the light emitting unit 200. Specifically, the first voltage applied to the electrochromic device 410 in the color-developing state may be a positive voltage or a negative voltage, and the voltage applied to the electrochromic device 410 in the transparent state may be a negative voltage or a positive voltage, which is generally in an inverse relationship with the voltage applied to the electrochromic device in the color-developing state, although it is also possible to apply a zero voltage in the transparent state, that is, in the non-charging state, the electrochromic device 410 is in the transparent state. The applied voltage value is selected according to the material of the electrochromic device 410, and is not particularly limited in this embodiment.
As shown in fig. 1, in an embodiment, when the display panel is in the breath screen state and a second voltage is applied to the electrochromic device 410, the electrochromic device 410 is in a transparent state, so that the display panel can display the color of the reflective layer.
In this embodiment, the display panel has a transparent state in the breath screen state, so that the display panel can display the color of the reflective layer. Therefore, the display panel can have two switching states in the screen state, that is, a first voltage can be applied to the electrochromic device 410 to enable the electrochromic device to display color, the display panel presents the superposed color of the electrochromic device 410 and the reflecting layer, and the display panel looks like a color mirror at this moment; or the electrochromic device 410 is applied with a second voltage to be transparent, the display panel takes on the color of the reflective layer, and the display panel looks like a common mirror at this time.
As shown in fig. 1 and 2, in some embodiments, electrochromic device 410 includes at least a first transparent electrode 420, an electrochromic layer 430, and a second transparent electrode 440; the display panel further includes a driving chip (not shown in the figure), wherein the first transparent electrode 420 and the second transparent electrode 440 are electrically connected to the driving chip, respectively, and the driving chip is configured to apply a first voltage to the electrochromic layer 430 through the first transparent electrode 420 and the second transparent electrode 440 to enable the electrochromic layer 430 to be in a color-developing state, so that the display panel can display a superimposed color of the reflective layer and the color-changing layer; or the driving chip is configured to apply a second voltage to the electrochromic layer 430 through the first transparent electrode 420 and the second transparent electrode 440 to make the electrochromic layer 430 show a transparent state, so that the display panel can show the color of the reflective layer.
In the present embodiment, the driving chip is electrically connected to the first and second transparent electrodes 420 and 440 for applying a voltage to the electrochromic layer 430 to control the electrochromic layer 430 to be switched between the colored state and the transparent state. The first transparent electrode 420 and the second transparent electrode 440 are made of transparent materials, so as to avoid affecting the light transmittance of the light emitting unit 200. Wherein the transparent material may be indium tin oxide (In) 2 O 3 ·SnO 2 ITO), indium zinc oxide (In) 2 O 3 ZnO, IZO), and the like.
Further, the electrochromic layer 430 is disposed between the first transparent electrode 420 and the second transparent electrode 440, and the first transparent electrode 420, the electrochromic layer 430, and the second transparent electrode 440 form a conductive circuit. The first and second transparent electrodes 420 and 440 may be selected from indium tin oxide (In) 2 O 3 ·SnO 2 ITO), indium zinc oxide (In) 2 O 3 ZnO, IZO), an ITO thin film or an IZO thin film has high conductivity, high visible light transmittance, high mechanical hardness, and good chemical stability.
As shown in fig. 1 and 2, in some embodiments, the electrochromic layer 430 includes an electrochromic material layer 450 disposed between the first and second transparent electrodes 420 and 440, an electrolyte layer 460 and an ion storage layer 470, the electrolyte layer 460 is disposed in contact with the electrochromic material layer 450, the ion storage layer 470 is disposed in contact with the electrolyte layer 460, the ion storage layer 470 is used to provide and store ions required for color change, and the electrolyte layer 460 is used to conduct ions required in a color change reaction process to the electrochromic material layer 450.
In the present embodiment, the ion storage layer 470 stores ions required for color change, and the electrolyte layer 460 is used for transmitting the ions to the electrochromic material layer 450, so that the electrochromic material layer 450 undergoes a redox reaction to realize color conversion. When a first voltage is applied to the first transparent electrode 420 and the second transparent electrode 440 by the driving chip, ions in the ion storage layer 470 enter the electrochromic material layer 450 through the electrolyte layer 460, and chemically react with substances of the electrochromic material layer 450 to make the electrochromic material layer 450 show a specific color. The voltage can affect the amount of ions entering the electrochromic material layer 450, and the adjustment of the color depth can be realized by controlling the voltage. After application of the second voltage, the ions are returned from the electrochromic material layer 450 through the electrolyte layer 460 to the ion storage layer 470 and the glass is returned to the original state.
Specifically, the ion storage layer 470 serves to store and supply ions required by the electrochromic material layer 450, and serves as a charge balance. The material of the ion storage layer 470 generally has a large vacancy size, can accommodate a large amount of ions, and shows excellent electrochemical stability with an extremely small change in the structure of the material during ion intercalation and deintercalation. Specifically, the ion storage layer 470 may be an oxide of Nickel (NiO) x ) Silicon oxide, vanadium pentoxide, prussian blue (iron ferrocyanide), and the like, the electrolyte layer 460 is used for transmitting conductive ions, and the material of the electrolyte layer 460 can be lithium fluoride, lithium cobaltate, potassium perchlorate, lithium molybdate, lithium niobate, and the like. The electrochromic material layer 450 serves to generate a stable and reversible color change phenomenon under the action of an applied electric field, and is visually represented as exhibiting reversible changes in color and transparency. The electrochromic material layer 450 may be selected from organic electrochromic materials or inorganic electrochromic materials, and when the inorganic electrochromic materials are selected, oxides of molybdenum, niobium, titanium, and the like may be selected,when the organic material layer is selected, one of polypyrrole, polyaniline, polythiophene, metal phthalocyanine, and viologen may be selected.
Illustratively, as shown in FIG. 3a, the ion storage layer 470 is NiO x The electrochromic process of the electrochromic device 410 is described below by taking LiF as the electrolyte layer 460 and tungsten oxide as the example of the electrochromic material layer 450. WO 3 The electrochromic process is mainly realized based on the reversible valence change of the W element and the reversible intercalation and deintercalation of cations (lithium ions, sodium ions, aluminum ions and the like). When lithium ions are used as cations, ions are implanted into WO when a negative voltage is applied to the electrochromic material layer 450 3 In the layer, a reduction reaction occurs to turn deep blue; when a positive voltage is applied, the ions are extracted and transformed back to WO 3 Is changed into a transparent state, specifically
Among them, WO 3 In a transparent state, li X WO 3 A dark blue state is present. As shown in fig. 3b, a spectrum diagram of the present embodiment is shown, the horizontal axis represents wavelength (wavelength) in nanometers (nm), and the vertical axis represents transmittance (abbreviated as T). The coloring (color) curve is a solid line, and the fading (bleach) curve is a dashed line, and it can be seen from the graph that the optical modulation amplitude of the electrochromic device 410 can reach 58.9%, and simultaneously, the electrochromic device exhibits greater coloring efficiency and cycling stability.
As shown in fig. 4, in other embodiments, the electrochromic layer 430 includes an electrochromic material layer 450 and a composite conductive layer 480 disposed between the first and second transparent electrodes 420 and 440, the composite conductive layer 480 being capable of generating free electrons and ions and conducting the ions required during a color change reaction to the electrochromic material layer 450.
In the present embodiment, the composite conductive layer 480 is capable of generating free electrons and ions and transferring the ions required during the color change reaction to the electrochromic material layer 450. When a first voltage is applied to the first transparent electrode 420 and the second transparent electrode 440 by the driving chip, ions in the composite conductive layer 480 enter the electrochromic material layer 450 and chemically react with the substances of the electrochromic material layer 450, so that the electrochromic material layer 450 shows a specific color. The voltage can affect the amount of ions entering the electrochromic material layer 450, and the adjustment of the color depth can be realized by controlling the voltage. After the second voltage is applied to the first transparent electrode 420 and the second transparent electrode 440 by the driving chip, the ions return to the composite conductive layer 480 from the electrochromic material layer 450, and the electrochromic material layer 450 returns to the original state.
As shown in fig. 1, in some embodiments, when the second voltage is applied in the bright screen state, the electrochromic material layer 450 is in a transparent state, and has no influence on the transmittance of the light emitting unit 200. In the breath screen state, when a first voltage is applied, the electrochromic material layer 450 is in a colored state, and the display area 10 of the display panel is in a superposed color of the reflective layer and the electrochromic material layer 450; when the second voltage is applied, the electrochromic material layer 450 is in a transparent state, and the display area 10 of the display panel shows a silver mirror effect of the reflective layer. Switching of the color superposition and the silver mirror effect in the breath screen state of the display area 10 of the display panel is realized by controlling the voltage.
The first voltage may be a positive voltage or a negative voltage, the second voltage may be a negative voltage or a positive voltage, and in some cases, the second voltage may also be a zero voltage, that is, in a case of no power, the electrochromic device is in a transparent state, or the first voltage is a zero voltage, that is, in a case of no power, the electrochromic device is in a color development state.
In some embodiments, the electrochromic layer 430 is made of an inorganic electrochromic material or/and an organic electrochromic material.
In this embodiment, the electrochromic layer 430 may be an inorganic electrochromic material, which has good stability and excellent bonding performance with conventional inorganic non-metallic materials. The electrochromic layer 430 may be an organic electrochromic material such as polypyrrole, polythiophene, polyaniline, and the like, and derivatives thereof.
In some embodiments, the inorganic electrochromic material comprises a transition metal oxide.
In the present embodiment, the transition metal tungsten oxide includes tungsten oxide, molybdenum oxide, and the like; or oxides or hydrated oxides of platinum, iridium, osmium, palladium, ruthenium, nickel, rhodium, or the like. The selection is made according to the color and response speed thereof, and is not particularly limited in this embodiment.
As shown in fig. 1, in some embodiments, the display panel further includes a light-shielding layer between the color-changing layer and the reflective layer; the light shielding layer includes a plurality of shielding units 600 arranged at intervals, and the shielding units 600 are located between two adjacent light emitting units 200 along a direction perpendicular to a plane where the substrate is located.
In this embodiment, the shielding unit 600 of the light shielding layer is located between two adjacent light emitting units along the orthographic projection in the plane direction perpendicular to the substrate 100, and the shielding unit 600 can prevent the optical crosstalk between the adjacent light emitting units 200 to improve the light emitting effect. On the other hand, the shielding unit 600 prevents external light from reflecting on the display panel, reduces the reflectivity of the display panel, prevents the reflected light of the display panel from interfering with the reflected light of the reflection unit 500, and improves the definition of the mirror surface. The shielding unit 600 may be made of a black light shielding material, so as to increase the absorption rate of light and reduce the reflectivity.
As shown in fig. 1, in some embodiments, an SCF (Super Clean Foam) layer 800 is disposed on a side of the substrate 100 away from the pixel light emitting layer, which can serve as a buffer, a light shield, and a heat sink.
As shown in fig. 1 and fig. 5, in some embodiments, the display panel further includes a peripheral region 20 in addition to the display region 10, the peripheral region 20 is disposed around the display region 10, the substrate 100 extends to the peripheral region 20, a plurality of electrochromic devices 410 are disposed on one side of the substrate 100 in the peripheral region 20, and the electrochromic devices 410 in the peripheral region 20 and the pixel light emitting layers are located on the same side of the substrate 100; the side of the electrochromic device 410 of the peripheral region 20 away from the substrate 100 is provided with a reflective element 500.
In the present embodiment, the light emitting unit 200 is not disposed in the peripheral region 20, and the plurality of electrochromic devices 410 and the reflective units 500 are disposed in the peripheral region 20, when a first voltage is applied in the screen-off state, the electrochromic material layer 450 shows a color-rendering state, and the peripheral region 20 of the display panel can also show the superimposed color of the reflective layer and the electrochromic material layer 450, as with the display region 10; when a second voltage is applied, the electrochromic material layer 450 is in a transparent state, and the peripheral region 20 of the display panel is the same as the display region 10, so that the silver mirror effect of the reflective layer can be achieved, and thus the overall color of the display panel is kept consistent in the breath screen state, and the effect of a full screen is better achieved.
The manufacturing method of the display panel in the embodiment includes the following steps:
a substrate 100 is provided, and a pixel light emitting layer, an encapsulation layer 300, a color changing layer, and a reflective layer are sequentially formed on one side of the substrate 100. The pixel light emitting layer includes a plurality of light emitting cells 200 arranged at intervals. The color changing layer includes a plurality of electrochromic devices 410 disposed at intervals, and the electrochromic devices 410 are disposed in one-to-one correspondence with the light emitting cells 200 in a direction perpendicular to the substrate. The reflective layer includes a plurality of reflective units 500 spaced apart from each other, the reflective units 500 being configured to reflect external light, and the reflective units 500 being located between two adjacent light emitting units 200 in a direction perpendicular to the substrate 100. The electrochromic device 410 can be changed between a transparent state and a color-developing state, and when the display panel is in the breath screen state and a first voltage is applied to the electrochromic device 410, the electrochromic device 410 is in the color-developing state, so that the display panel can display the superposed color of the reflective layer and the color-developing layer.
In this embodiment, the light emitting unit 200 is vacuum-deposited on one side of the substrate 100, and the encapsulation layer 300 is fabricated by PECVD (Plasma Enhanced Chemical Vapor Deposition), the encapsulation layer 300 covers the pixel light emitting layer, and the material of the encapsulation layer 300 is preferably silicon nitride.
In the actual manufacturing process, a driving circuit layer is first formed on the substrate 100, and then the light emitting unit 200 is vapor-deposited on the driving circuit layer. A pixel light emitting layer including a plurality of light emitting cells 200 arranged at intervals is formed on the driving circuit. An encapsulation layer 300 is formed on the pixel light emitting layer, and the encapsulation layer 300 covers the pixel light emitting layer. A color change layer is fabricated on the encapsulation layer 300, and the color change layer includes a plurality of electrochromic devices 410 disposed in one-to-one correspondence with the light emitting cells 200. A first planarization layer 400 is fabricated on the color-changing layer, the first planarization layer 400 covering the color-changing layer. A reflective layer is formed on the first planarization layer 400, the reflective layer forms a plurality of reflective units 500 arranged at intervals, and the reflective units 500 are located between two adjacent light-emitting units 200 along a direction perpendicular to the plane of the substrate 100. A second planarization layer 510 is formed on the reflective layer, and the reflective layer is covered by the second planarization layer 510.
A reflective layer is formed on the first planarization layer 400, the reflective layer includes a plurality of reflective units 500 disposed at intervals, the plurality of reflective units 500 reflect external light, and the reflective layer formed by the plurality of reflective units 500 makes the display panel show a mirror effect. Along the direction perpendicular to the plane of the substrate 100, the reflection unit 500 is located between two adjacent light-emitting units 200, that is, the reflection unit 500 and the light-emitting units 200 are arranged in a staggered manner, so that the normal emission of light emitted by the light-emitting units 200 is not affected, and the reflection layer not only realizes the mirror effect of the display panel, but also does not affect the light transmittance of the light-emitting units 200. Specifically, the reflective layer is made of a metal material, such as Al, ag, or Mo.
A color-changing layer is manufactured on the packaging layer 300, the color-changing layer is manufactured into a plurality of electrochromic devices 410 arranged at intervals by adopting a PECVD (plasma enhanced chemical vapor deposition) or vacuum evaporation method, the electrochromic devices 410 can be changed between a transparent state and a color-developing state, and the electrochromic devices 410 are arranged in one-to-one correspondence with the light-emitting units 200 along a direction perpendicular to the plane of the substrate 100. In the bright state, the transmittance of light emitted from the light emitting unit 200 is not affected by controlling the voltage applied to the electrochromic device 410 to be converted into the transparent state. In the breath screen state, the electrochromic device 410 and the reflective unit 500 together display the superimposed color by controlling the first voltage applied to the electrochromic device 410 to be converted into the color rendering state. The applied voltage may be a positive voltage, a negative voltage, or a zero voltage, and the voltage value needs to be controlled according to the material of the electrochromic device 410, which is not particularly limited in this embodiment.
The second planarization layer 510 covers the reflective layer, and the second planarization layer 510 serves as a planarization layer for facilitating the fabrication of the glass cover plate 700 on the second planarization layer 510. The first and second planarization layers 400 and 510 are OC (Over Coat) materials, the OC materials are epoxy resins, and specifically, the OC materials may be gel Coat resins. Further, the first and second planarization layers 400 and 510 can be printed by Ink-jet Printing (IJP).
In some embodiments, a light shielding layer is formed between the electrochromic device 410 and the reflective layer, and the light shielding layer includes a plurality of shielding units 600 arranged at intervals, and the shielding units 600 are located between two adjacent light emitting units in a direction perpendicular to the plane of the substrate 100.
In the present embodiment, the shielding unit 600 is disposed between two adjacent light emitting units 200 along a direction perpendicular to the plane of the substrate 100, that is, the shielding unit 600 is disposed to be staggered from the light emitting units 200. On the one hand, the shielding unit 600 can prevent the optical crosstalk of the adjacent light emitting units 200 to improve the light emitting effect. On the other hand, the shielding unit 600 prevents external light from reflecting on the display panel, reduces the reflectivity of the display panel, prevents the reflected light of the display panel from interfering with the reflected light of the reflection unit 500, and improves the definition of the mirror surface.
A second aspect of the present application provides a display device, including the display panel in any of the embodiments of the first aspect.
In the present embodiment, the display panel of the display device is changed to the transparent state by controlling the voltage applied to the electrochromic device 410 in the bright state, without affecting the transmittance of the light emitted from the light emitting unit 200. In the breath screen state, the electrochromic device 410 and the reflective unit 500 together display the superimposed color by controlling the first voltage applied to the electrochromic device 410 to be converted into the color rendering state.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the scope of protection of the present application.
Claims (10)
1. A display panel, comprising: the display area comprises a substrate, and a pixel light emitting layer, an encapsulation layer, a color changing layer and a reflection layer which are sequentially arranged on one side of the substrate;
the pixel light-emitting layer comprises a plurality of light-emitting units arranged at intervals;
the color changing layer comprises a plurality of electrochromic devices arranged at intervals, and the electrochromic devices and the light emitting units are arranged in a one-to-one correspondence manner along a direction perpendicular to the plane of the substrate;
the reflecting layer comprises a plurality of reflecting units which are arranged at intervals, the reflecting units are used for reflecting external light, and the reflecting units are positioned between two adjacent light-emitting units along the direction perpendicular to the plane of the substrate;
the electrochromic device can be changed between a transparent state and a color development state, and when a first voltage is applied to the electrochromic device in the breath screen state of the display panel, the electrochromic device is in the color development state, so that the display panel can display the superposed color of the reflecting layer and the color development layer.
2. The display panel according to claim 1, wherein when a second voltage is applied to the electrochromic device in a breath-hold state, the electrochromic device is in a transparent state, so that the display panel can display the color of the reflective layer.
3. The display panel according to claim 1, wherein the electrochromic device comprises at least a first transparent electrode, an electrochromic layer, and a second transparent electrode;
the display panel further comprises a driving chip, the first transparent electrode and the second transparent electrode are respectively electrically connected with the driving chip, and the driving chip is used for applying a first voltage to the electrochromic layer through the first transparent electrode and the second transparent electrode to enable the electrochromic layer to be in the color development state, so that the display panel can display the superposed color of the reflecting layer and the color development layer; or the driving chip is used for applying a second voltage to the electrochromic layer through the first transparent electrode and the second transparent electrode to enable the electrochromic layer to be in the transparent state, so that the display panel can display the color of the reflecting layer.
4. The display panel according to claim 3, wherein the electrochromic layer comprises an electrochromic material layer disposed between the first transparent electrode and the second transparent electrode, an electrolyte layer disposed in contact with the electrochromic material layer, and an ion storage layer disposed in contact with the electrolyte layer, wherein the ion storage layer is configured to provide and store ions required for color change, and wherein the electrolyte layer is configured to conduct ions required during a color change reaction to the electrochromic material layer.
5. The display panel of claim 3, wherein the electrochromic layer comprises a layer of electrochromic material and a composite conducting layer disposed between the first transparent electrode and the second transparent electrode, the composite conducting layer being capable of generating free electrons and ions and conducting ions to the layer of electrochromic material that are needed during the color change reaction.
6. The display panel according to claim 3, wherein the electrochromic layer is made of an inorganic electrochromic material or/and an organic electrochromic material.
7. The display panel according to claim 6, wherein the inorganic electrochromic material comprises a transition metal oxide.
8. The display panel according to any one of claims 1 to 7, wherein the display panel further comprises a peripheral region disposed around the display region, the substrate extending to the peripheral region, a plurality of the electrochromic devices being disposed on a substrate side of the peripheral region, the electrochromic devices of the peripheral region being located on a same side of the substrate as the pixel light-emitting layer;
and a reflection unit is arranged on one side of the electrochromic device in the peripheral area, which is far away from the substrate.
9. The display panel according to any one of claims 1 to 7, wherein the display panel further comprises a light-shielding layer between the color-changing layer and the reflective layer;
the shading layer comprises a plurality of shading units arranged at intervals, and the shading units are positioned between two adjacent light-emitting units along the direction perpendicular to the plane where the substrate is located.
10. A display device comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211448983.6A CN115729007A (en) | 2022-11-18 | 2022-11-18 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211448983.6A CN115729007A (en) | 2022-11-18 | 2022-11-18 | Display panel and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115729007A true CN115729007A (en) | 2023-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211448983.6A Pending CN115729007A (en) | 2022-11-18 | 2022-11-18 | Display panel and display device |
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| Country | Link |
|---|---|
| CN (1) | CN115729007A (en) |
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2022
- 2022-11-18 CN CN202211448983.6A patent/CN115729007A/en active Pending
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